Before it makes a final determination, the DEC will accept public comment for the next month. The property is currently on the state’s Inactive Hazardous Waste Disposal Site list, which identifies properties being investigated for potential hazardous waste and outlines any cleanup efforts taking place.

It was created in 1946, when Parker Wickham of Mattituck, who overhauled airplane engines during World War II, converted part of his family’s New Suffolk Avenue potato farm into a small airport and plane engine rebuilding shop under the name Mattituck Services, according to previous Suffolk Times coverage. The property is still owned by the Wickham family.

The site currently operates as an “informal airbase used by a few area pilots,” said Southold Supervisor Scott Russell.

The 12-acre site included a half-acre parcel where chemicals — including fuels, oils and cleaners — were once used for maintenance and repair work, according to state DEC officials.

According to the state agency’s listing, solvent rinses and wastewater used on the property were discharged to leaching pools in the area from 1946 to 1979, leaving elevated levels of copper, iron, nickel, zinc, lead and cadmium in nearby soils, as well as several pesticide ingredients.

To remedy the pollution, 25 tons of contaminated but non-hazardous soils were excavated from the area surrounding the leaching pools in 1997, with excavation extending at least three feet below the water table, the DEC listing states. The area was then packed with clean fill and closed.

Soil testing conducted in November 2013 found no lingering impact from the contaminants in question and it was determined that no public or environmental threats exist at the site, according to DEC officials.

Mr. Russell said he’s encouraged to hear that the historic site stands to be removed from the Superfund program.

“If the DEC is satisfied, naturally we are,” he said. “Certainly it is in the town’s interest to see all [of these areas] get remediated and delisted.”